#include <bits/stdc++.h>
using namespace std;

int main(){
	int a,b,c;
	cin >> a >> b >> c;
	if(pow(a,2)+pow(b,2)==pow(c,2)|pow(b,2)+pow(c,2)==pow(a,2)|pow(a,2)+pow(c,2)==pow(b,2)){
		cout << "yes" << endl;
	 		  }
	else{
		cout << "no" << endl;
		} 
	return 0;
}
